1 /*
2 * Copyright (c) 2004, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 4974913
27 * @summary Test that array classes can be found in signatures always
28 * and can be deserialized by the deprecated MBeanServer.deserialize method
29 * @author Eamonn McManus
30 * @modules java.management
31 * @run clean ArrayClassTest
32 * @run build ArrayClassTest
33 * @run main ArrayClassTest
34 */
35
36 import java.io.*;
37 import java.lang.reflect.*;
38 import java.net.*;
39 import java.nio.file.Paths;
40 import javax.management.*;
41 import javax.management.loading.*;
42
43 public class ArrayClassTest {
44 public static void main(String[] args) throws Exception {
45 MBeanServer mbs = MBeanServerFactory.createMBeanServer();
46
47 String[] cpaths = System.getProperty("test.classes", ".")
48 .split(File.pathSeparator);
49 URL[] urls = new URL[cpaths.length];
50 for (int i=0; i < cpaths.length; i++) {
51 urls[i] = Paths.get(cpaths[i]).toUri().toURL();
52 }
53
54 // Create an MLet that can load the same class names but
55 // will produce different results.
56 ClassLoader loader = new SpyLoader(urls);
57 ObjectName loaderName = new ObjectName("test:type=SpyLoader");
58 mbs.registerMBean(loader, loaderName);
59
60 ObjectName testName = new ObjectName("test:type=Test");
61 mbs.createMBean(Test.class.getName(), testName, loaderName,
62 new Object[1], new String[] {X[].class.getName()});
63 ClassLoader checkLoader = mbs.getClassLoaderFor(testName);
64 if (checkLoader != loader)
65 throw new AssertionError("Wrong loader: " + checkLoader);
66
67 mbs.invoke(testName, "ignore", new Object[1],
68 new String[] {Y[].class.getName()});
69
70 ByteArrayOutputStream bout = new ByteArrayOutputStream();
71 ObjectOutputStream oout = new ObjectOutputStream(bout);
72 oout.writeObject(new Z[0]);
73 oout.close();
74 byte[] bytes = bout.toByteArray();
75 ObjectInputStream oin = mbs.deserialize(testName, bytes);
76 Object zarray = oin.readObject();
77 String failed = null;
78 if (zarray instanceof Z[])
79 failed = "read back a real Z[]";
80 else if (!zarray.getClass().getName().equals(Z[].class.getName())) {
81 failed = "returned object of wrong type: " +
82 zarray.getClass().getName();
83 } else if (Array.getLength(zarray) != 0)
84 failed = "returned array of wrong size: " + Array.getLength(zarray);
85 if (failed != null) {
86 System.out.println("TEST FAILED: " + failed);
87 System.exit(1);
88 }
89
90 System.out.println("Test passed");
91 }
92
93 public static interface TestMBean {
94 public void ignore(Y[] ignored);
95 }
96
97 public static class Test implements TestMBean {
98 public Test(X[] ignored) {}
99 public void ignore(Y[] ignored) {}
100 }
101
102 public static class X {}
103 public static class Y {}
104 public static class Z implements Serializable {}
105
106 public static interface SpyLoaderMBean {}
107
108 /* We originally had this extend MLet but for some reason that
109 stopped the bug from happening. Some side-effect of registering
110 the MLet in the MBean server caused it not to fail when asked
111 to load Z[]. */
112 public static class SpyLoader extends URLClassLoader
113 implements SpyLoaderMBean, PrivateClassLoader {
114 public SpyLoader(URL[] urls) {
115 // important that the parent classloader be null!
116 // otherwise we can pick up classes from the classpath
117 super(urls, null);
118 }
119
120 /*
121 public Class loadClass(String name) throws ClassNotFoundException {
122 System.out.println("loadClass: " + name);
123 return super.loadClass(name);
124 }
125
126 public Class loadClass(String name, boolean resolve)
127 throws ClassNotFoundException {
128 System.out.println("loadClass: " + name + ", " + resolve);
129 return super.loadClass(name, resolve);
130 }
131 */
132
133 public Class findClass(String name) throws ClassNotFoundException {
134 System.out.println("findClass: " + name);
135 if (false)
136 new Throwable().printStackTrace(System.out);
137 Class c = super.findClass(name);
138 System.out.println(" -> " + name + " (" + c.getClassLoader() + ")");
139 return c;
140 }
141 }
142 }